While holidaying in Norway, Glys Erlendson encounters an eerie woman deep in the forest. Thereafter she is plagued by frightening visions, which no one can explain. After a terrifying, near-death experience, Glys discovers that she is not human, and belongs to a secretive race known as Enchanters. Aided by powerful companions, Glys' transformative journey leads her through a dreamlike, prismatic Enchanter realms, a human city dominated by murderous Changelings, and into the terrifying Noctivoll Underworld, where her ultimate destiny and that of the entire world is finally revealed.